I feel compelled to write this review because this book doesn't deserve one star.
While it's true that some of Harley's deployment of Foucault (and Barthes) seems a little perfunctory at times-- perhaps Harley is indeed guilty of a little academic trendiness--in total, I found his arguments to be thought-provoking, and unlike the other reviewer, quite readable. The essay on cartographic ethics is still relevant, perhaps now more than ever as we become further and further immersed in a sea of digital maps with almost as little thought on the subject as ever. Ultimately, the take away message from this book for me was one of skeptical readership. Maps, like any other text, should be read and thought about critically and skeptically. In a similar vein, just because one doesn't agree with all the ideas and arguments presented doesn't mean that they can be dismissed outright.
Harvey was one of the most important cartographic historians of the last 50 years, and I think that he should be cut some slack for his willingness to go out on a limb, coming as he does from a field where some still claim that maps are objective, "scientific" representations of reality.
Even if Harvey's project doesn't completely work in it's entirety, sometimes just asking the questions is a valuable exercise.